Windows "embedded" Python downloads are malformed

[njsmith]

BPO	35684
Nosy	@njsmith, @zooba, @tirkarthi
Superseder	bpo-35596: Fatal Python error: initfsencoding: unable to load the file system codec zipimport.ZipImportError: can't find module 'encodings'

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/zooba'
closed_at = <Date 2019-01-08.10:37:30.952>
created_at = <Date 2019-01-08.10:28:52.681>
labels = []
title = 'Windows "embedded" Python downloads are malformed'
updated_at = <Date 2019-01-08.10:46:07.146>
user = 'https://github.com/njsmith'

bugs.python.org fields:

activity = <Date 2019-01-08.10:46:07.146>
actor = 'xtreak'
assignee = 'steve.dower'
closed = True
closed_date = <Date 2019-01-08.10:37:30.952>
closer = 'serhiy.storchaka'
components = []
creation = <Date 2019-01-08.10:28:52.681>
creator = 'njs'
dependencies = []
files = []
hgrepos = []
issue_num = 35684
keywords = []
message_count = 3.0
messages = ['333217', '333218', '333220']
nosy_count = 3.0
nosy_names = ['njs', 'steve.dower', 'xtreak']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = '35596'
type = None
url = 'https://bugs.python.org/issue35684'
versions = []

[njsmith]

~$ unzip -l /tmp/python-3.7.2-embed-amd64.zip
Archive: /tmp/python-3.7.2-embed-amd64.zip
Length Date Time Name
--------- ---------- ----- ----
99856 2018-12-23 23:10 python.exe
98320 2018-12-23 23:10 pythonw.exe
3780624 2018-12-23 23:09 python37.dll
58896 2018-12-23 23:10 python3.dll
85232 2018-12-10 22:06 vcruntime140.dll
200208 2018-12-23 23:10 pyexpat.pyd
26640 2018-12-23 23:10 select.pyd
1073168 2018-12-23 23:10 unicodedata.pyd
28688 2018-12-23 23:10 winsound.pyd
71184 2018-12-23 23:10 _asyncio.pyd
89104 2018-12-23 23:10 _bz2.pyd
22544 2018-12-23 23:10 _contextvars.pyd
133136 2018-12-23 23:10 _ctypes.pyd
267792 2018-12-23 23:10 _decimal.pyd
209424 2018-12-23 23:10 _elementtree.pyd
38928 2018-12-23 23:10 _hashlib.pyd
257040 2018-12-23 23:10 _lzma.pyd
39440 2018-12-23 23:10 _msi.pyd
29200 2018-12-23 23:10 _multiprocessing.pyd
44048 2018-12-23 23:10 _overlapped.pyd
27664 2018-12-23 23:10 _queue.pyd
75792 2018-12-23 23:10 _socket.pyd
85520 2018-12-23 23:10 _sqlite3.pyd
123408 2018-12-23 23:10 _ssl.pyd
2480296 2018-12-23 22:20 libcrypto-1_1-x64.dll
523944 2018-12-23 22:20 libssl-1_1-x64.dll
1190416 2018-12-23 23:10 sqlite3.dll
85232 2018-12-10 22:06 vcruntime140.dll
2386539 2018-12-23 23:14 python37.zip
79 2018-12-23 23:14 python37._pth
--------- -------
13632362 30 files

Notice that "vcruntime140.dll" appears twice on this list, once near the top and once near the bottom.

If we try to unpack this using the powershell Expand-Archive command, it fails with:

Failed to create file 'D:\a\1\s\python-dir\vcruntime140.dll' while expanding the archive file
'D:\a\1\s\python.zip' contents as the file 'D:\a\1\s\python-dir\vcruntime140.dll' already exists. Use the -Force
parameter if you want to overwrite the existing directory 'D:\a\1\s\python-dir\vcruntime140.dll' contents when
expanding the archive file.

Probably it would be better to only include one copy of vcruntime140.dll :-)

[tirkarthi]

Seems this is fixed as part of related issue bpo-35596

[njsmith]

You're right, good catch!